function showModal(divID)
{
    var sDiv = document.getElementById(divID);
    
    if (navigator.userAgent.indexOf('Safari') != -1)
	{
		window.onscroll = function () { sDiv.style.style.top = document.body.scrollTop + "px"; };
	   	sDiv.style.display = "block";
	   	sDiv.style.top = document.body.scrollTop + "px";
	}
	else
	{
		window.onscroll = function () { sDiv.style.top = document.documentElement.scrollTop + "px"; };
	   	sDiv.style.display = "block";
	   	sDiv.style.top = document.documentElement.scrollTop + "px";
	   	
	   	sDiv.style.display = "block";
   	}
}

function hideModal(divID)
{
    document.getElementById(divID).style.display = "none";
}

function windowOpenCenter(windowHeight, windowWidth, windowUrl)
{
    var centerWidth = (window.screen.width - windowWidth) / 2;
    var centerHeight = (window.screen.height - windowHeight) / 2;

    newWindow = window.open(windowUrl, 'myNewWindow', 'resizable=0,width=' + windowWidth + 
        ',height=' + windowHeight + 
        ',left=' + centerWidth + 
        ',top=' + centerHeight);

    newWindow.focus();
}